High response photochromic films based on D-A diarylethenes and their application in holography.
Journal
RSC advances
ISSN: 2046-2069
Titre abrégé: RSC Adv
Pays: England
ID NLM: 101581657
Informations de publication
Date de publication:
09 Jul 2020
09 Jul 2020
Historique:
received:
24
06
2020
accepted:
02
07
2020
entrez:
6
5
2022
pubmed:
13
7
2020
medline:
13
7
2020
Statut:
epublish
Résumé
A set of photochromic dithienylethenes bearing amino and nitro groups are synthesised and embedded at high concentrations in a polymer matrix (Cellulose Acetate Butyrate, CAB) to produce films showing a large reversible modulation of the complex refractive index in the Vis-NIR spectral range, thanks to an interesting combination of remarkable response at the molecular level and very high load capability in the chosen matrix. The photochromic derivatives are characterized in solution and in CAB films by means of electronic and vibrational spectroscopy, complemented by DFT calculations. Both the real and imaginary part of the refractive index are determined by spectroscopic ellipsometry. The modulation of the refractive index in the near infrared is in the range 0.02-0.04. These are very large values for such kinds of systems and they are due to a favourable combination of very large solubility of the derivatives in CAB and a high polarisability change. As for the change in transparency in the visible, contrast values larger than 10
Identifiants
pubmed: 35519783
doi: 10.1039/d0ra05535b
pii: d0ra05535b
pmc: PMC9055363
doi:
Types de publication
Journal Article
Langues
eng
Pagination
26177-26187Informations de copyright
This journal is © The Royal Society of Chemistry.
Déclaration de conflit d'intérêts
There are no conflicts to declare.
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